Convert Kilograys to Grays (kGy to Gy)
1 kilogray (kGy) = 1000 grays (Gy). 1 Gy = 0.001 kGy. Example: 15 kGy = 15 × 1000 = 15000 Gy.
Also searched as kilograys to Gy, kilograys in Gy, kilograys into grays, kGy to Gy, kGy in grays, kGy into gray, kilogray to gray, kGy to grays converter and how many grays in a kilogray.
1 kGy = 1000 Gy
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilogray to gray converter to paste a column from Excel.
How to Convert Kilogray to Gray
- 1 kGy = 1000 Gy
- 1 Gy = 0.001 kGy
- Example: convert 15 kGy to Gy: 15 kGy = 15 × 1000 Gy = 15000 Gy
Formula
Gy = kGy × 1000
Derivation from SI units:
- 1 kGy = 10³ Gy.
- 1 Gy = 1 J of absorbed energy per kg.
Both units are defined exactly, so the factor is exact. Kilogray definition: kilogray; Gray definition: gray.
Worked examples
- A reading of 15 kGy converts to 15000 Gy.
15 kGy × 1000 = 15000 Gy - A value of 50 kGy is 50000 Gy.
50 kGy × 1000 = 50000 Gy
Kilogray to Gray conversion table
| Kilograys (kGy) | Grays (Gy) |
|---|---|
| 1 kGy | 1000 Gy |
| 5 kGy | 5000 Gy |
| 10 kGy | 10000 Gy |
| 15 kGy | 15000 Gy |
| 25 kGy | 25000 Gy |
| 30 kGy | 30000 Gy |
| 50 kGy | 50000 Gy |
| 100 kGy | 100000 Gy |
| 1000 kGy | 1000000 Gy |
| 10000 kGy | 10000000 Gy |
Where it's used
Kilograys are used for sterilisation of medical devices (25 kGy), while grays appear in radiotherapy prescriptions. Both measure absorbed dose of ionising radiation, so the conversion is a fixed factor.
Kilogray to other absorbed dose units
| Conversion | 1 kGy equals |
|---|---|
| kilogray to gray | 1000 Gy |
| kilogray to milligray | 1000000 mGy |
| kilogray to rad | 100000 rad |
| kilogray to microgray | 1000000000 µGy |
| kilogray to centigray | 100000 cGy |
| kilogray to millirad | 100000000 mrad |
Frequently asked questions
How many grays are in 1 kilogray?
1 kGy = 1000 Gy.
How do I convert kilograys to grays?
Multiply the value in kGy by 1000. For example, 15 kGy × 1000 = 15000 Gy.
Is the kGy to Gy conversion exact?
Yes. Both units are defined exactly, and 1 kGy is exactly 1000 Gy.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Kilograys to Grays (kGy to Gy). Retrieved October 25, 2026, from https://scientificconverters.com/absorbed-dose/kilograys-to-grays/
IEEE
Scientific Converters, "Convert Kilograys to Grays (kGy to Gy)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/absorbed-dose/kilograys-to-grays/